[ServiceWorker] Convert ping-pong IPC into mojo interface ServiceWorkerEventDispatcher

content/renderer/service_worker/service_worker_context_client.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_CLIENT_H_
 #define CONTENT_RENDERER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_CLIENT_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 221 matching lines @@
       const DispatchNotificationCloseEventCallback& callback) override;
   void DispatchPushEvent(const PushEventPayload& payload,
                          const DispatchPushEventCallback& callback) override;
   void DispatchSyncEvent(
       const std::string& tag,
       blink::mojom::BackgroundSyncEventLastChance last_chance,
       const DispatchSyncEventCallback& callback) override;
   void DispatchPaymentRequestEvent(
       payments::mojom::PaymentAppRequestPtr app_request,
       const DispatchPaymentRequestEventCallback& callback) override;
+  void Ping(const PingCallback& callback) override;
 
   void OnInstallEvent(int request_id);
   void OnNotificationClickEvent(
       int request_id,
       const std::string& notification_id,
       const PlatformNotificationData& notification_data,
       int action_index,
       const base::NullableString16& reply);
   void OnNotificationCloseEvent(
       int request_id,
       const std::string& notification_id,
       const PlatformNotificationData& notification_data);
 
   void OnDidGetClient(int request_id, const ServiceWorkerClientInfo& client);
   void OnDidGetClients(
       int request_id, const std::vector<ServiceWorkerClientInfo>& clients);
   void OnOpenWindowResponse(int request_id,
                             const ServiceWorkerClientInfo& client);
   void OnOpenWindowError(int request_id, const std::string& message);
   void OnFocusClientResponse(int request_id,
                              const ServiceWorkerClientInfo& client);
   void OnNavigateClientResponse(int request_id,
                                 const ServiceWorkerClientInfo& client);
   void OnNavigateClientError(int request_id, const GURL& url);
   void OnDidSkipWaiting(int request_id);
   void OnDidClaimClients(int request_id);
   void OnClaimClientsError(int request_id,
                            blink::WebServiceWorkerError::ErrorType error_type,
                            const base::string16& message);
-  void OnPing();
-
   // Called to resolve the FetchEvent.preloadResponse promise.
   void OnNavigationPreloadResponse(
       int fetch_event_id,
       std::unique_ptr<blink::WebURLResponse> response,
       std::unique_ptr<blink::WebDataConsumerHandle> data_consumer_handle);
   // Called when the navigation preload request completed. Either
   // OnNavigationPreloadComplete() or OnNavigationPreloadError() must be called
   // to release the preload related resources.
   void OnNavigationPreloadComplete(int fetch_event_id);
   // Called when an error occurred while receiving the response of the
@@ skipping 27 matching lines @@
   // Initialized on the worker thread in workerContextStarted and
   // destructed on the worker thread in willDestroyWorkerContext.
   std::unique_ptr<WorkerContextData> context_;
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerContextClient);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_SERVICE_WORKER_SERVICE_WORKER_CONTEXT_CLIENT_H_